2.7.13. Goodbys Creek

2.7.13.1. About Goodbys Creek

Figure 2.44
Figure 2.45 The Goodbys Creek Tributary (WBID 2326).
  • East of the St. Johns River opposite NAS Jacksonville
  • Primary Land Use: Residential
  • Current TMDL reports: Fecal Coliform with BMAP (2009)
  • Verified Impaired 2016 (final): None
  • WBID Area: 5.1 sq. mi.
  • Beneficial Use: Class III F (Recreational – Freshwater)

2.7.13.2. Data sources

Result data were downloaded from the FL STORET website (DEP 2010e) and filtered based on the stations (DEP 2010f) in Goodbys Creek WBID 2326, 2326A (freshwater), and 2326B ( (DEP 2014c) shown above. The filtered dataset was used to generate Table 2.11.

2.7.13.3. Discussion

Water quality data for Goodbys Creek are shown in Table 2.11. Previous average phosphorus levels in Goodbys Creek exceeded the recently updated WQC (EPA 2010b), but recent data suggest that the average phosphorus levels have held roughly steady near the WQC.  Average dissolved oxygen in the freshwater portion of Goodbys Creek (2326A) is above the WQC, but the limited sampling performed in the saltwater portion (2326B) indicates lower dissolved oxygen levels with a higher frequency of low dissolved oxygen measurements.  Similarly, chlorophyll-a concentrations in the freshwater portion of Goodbys Creek were within acceptable limits, but average chlorophyll-a concentrations in the marine portion are at or above the WQC.  There are limited data in STORET regarding water quality in general in the marine portion of Goodbys Creek.

The fecal coliform level, averaged over all the stations in Goodbys Creek, is below the critical level of 2.6, which is the logarithm of the state maximum of 400 colony-forming-units per 100 mL. A TMDL report is available for fecal coliform in Goodbys Creek (Wainwright 2005b). (Note: the data analyses in the TMDL are based on different criteria than that used in this report). Subsequently, a BMAP for Goodbys Creek was legally adopted in 2009 (DEP 2009b).  The 2016 Annual Progress Report for this BMAP listed 18 active, ongoing projects underway by FDOT and JEA to address the BMAP in the Goodbys Creek watershed (DEP 2017c). FDEP reported improvement in the frequency of fecal coliform exceedances in the marine segment of Goodbys Creek, and recent fecal coliform measurements agree with this assessment. Average fecal coliform concentrations appear to be trending downward and were around the WQC in 2017. Additional information about fecal coliform in the tributaries can be found in Section 2.6 and Table 2.2.

Table 2.11 Water quality data for Goodbys Creek (2015-2017).

 Water QualityAverage and Number of Samples º
ParameterCriteria201520162017
Dissolved Oxygen (mg/L)≥34% sat.
(≥3.0) FW
4.88
(1 of 18 samples)
5.02
(3 of 12 samples)
5.14
(0 of 9 samples)
≥4.0 SW3.88
(6 of 9 samples)
2.40
(1 of 1 samples)
4.06
(2 of 4 samples)
Nitrate-nitrite N (mg/L)§§0.12
(11 samples)
No data0.07
(6 samples)
Total Phosphorus (mg/L)<0.120.10
(0 of 11 samples)
No data0.13
(0 of 6 samples)
Chlorophyll-a (µg/L)<20 FW1.55
(0 of 6 samples)
No data1.70
(0 of 2 samples)
<5.4 SW10.40
(2 of 5 samples)
No data12.43
(3 of 4 samples)
Arsenic (µg/L)≤50 FWNo dataNo data4.18
(0 of 2 samples)
Cadmium (µg/L)≤0.3 FWNo dataNo data0.01
(0 of 2 samples)
Copper (µg/L)≤9.3 FWNo dataNo data0.40
(0 of 2 samples)
Lead (µg/L)≤3.2 FWNo dataNo data0.10
(0 of 2 samples)
Nickel (µg/L)≤52 FWNo dataNo data0.35
(0 of 2 samples)
Silver (µg/L)≤0.07 FWNo dataNo data0.01
(0 of 2 samples)
Zinc (µg/L)≤120 FWNo dataNo data2.50
(0 of 2 samples)
Fecal Coliform (CFU/100 mL)<400580
(8 of 16 samples)
530
(7 of 13 samples)
380
(2 of 6 samples)
Turbidity (NTU)<296.25
(0 of 11 samples)
No data5.97
(0 of 6 samples)
Note: Hardness-dependent freshwater criteria for cadmium, copper, lead, nickel, and zinc were generated based on a hardness concentration of 100 mg/L.
º = Number of samples below WQC for Dissolved Oxygen, Number of samples above WQC for all other parameters
FW = freshwater; SW = saltwater (marine). Values denoted with (*) indicate a proposed criterion, which has not yet been adopted.
Values denoted with () are reference values based on EPA criteria (EPA 2010b), but the water body is not regulated by this standard.
§ = No water quality criterion has been established for Nitrate-Nitrite nitrogen. No Total Nitrogen data were available in STORET for 2015-2017.